Home / 20,763.92-28,653.19-11,688.75

Finding the Fourth Proportional to 20,763.92, 28,653.19 and 11,688.75

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Solution

The fourth proportional to 20,763.92, 28,653.19 and 11,688.75 is: 16,129.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,763.92 : 28,653.19 = 11,688.75 : x
  2. Step 2: Convert to fraction form
    20,763.92/28,653.19 = 11,688.75/x
  3. Step 3: Cross multiply
    20,763.92x = 28,653.19 × 11,688.75
  4. Step 4: Simplify right side
    20,763.92x = 334,919,974.61
  5. Step 5: Solve for x
    x = 334,919,974.61/20,763.92
  6. Step 6: Final answer
    x = 16,129.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.